EDWIN CHAPIN STARKS 23 



In life the Cv^lor was flesh-color, with the back slightly darker with 

 slaty brown. In alcohol the only pigment is a dusky brown narrow band 

 along the back. 



This species may be known from other members of its genus by its 

 having a blunt, rounded snout overhanging a small mouth. 



Four specimens were taken at Para, all of them about 6 inches in 

 length. 



69. Sternarchogiton natterei (Steindachner). 



A single small specimen was collected by Dr. Baker and Mr. Mann at 

 the mouth of the Madeira River. 



70. Sternarchorhamphus muUeri (Steindachner). 



Many specimens of this species were taken at the market at Para. 



Among them there is a very great variation in the caudal and fin. In 

 many of them the peduncle is nearly twice as long as the head and tapers 

 almost to a point. Its narrowest part is scarcely wider than the very small 

 eye, and the caudal fin is only a trifle wider. In others it is less than the 

 length of the head and tapers more rapidly to a width similar to the first ones. 

 In one specimen it is no longer than the snout and scarcely tapers at all, 

 being three or four times as wide as the narrowest ones, or equal to one- 

 fourth of the length of the snout, while the fin is correspondingly large. 

 One specimen has the peduncle very wide and short, and the fin very diminu- 

 tive as usual. These specimens do not otherwise differ from each other except 

 in the position of the vent, and this variation has no correlation with the 

 caudal variation. The vent may vary from a position a trifle behind the 

 eye to one considerably in front of it. 



These specimens are all colorless in alcohol except a slight tinge of 

 orange-yellow on the fins and a slight dusky tinge on the back. One speci- 

 men, however, differs in being a rather dark slaty-brown, almost uniform, 

 but slightly darker above ; about the opercular region are blue shades ; the 

 fins are bright orange, growing yellow toward the tips of the rays, with the 

 tips dusky, or on the pectoral, nearly black. 



71. Sternarchorhynchus curvirostris (Boulenger). 



This species is common at Para, though it has not been before recorded 

 from the lower Amazon. 



72. Sternarchorhynchus oxyrhjnichus (Miiller and Troschel). 



A small specimen was taken by Dr. Baker and Mr. Mann about 400 

 miles above the mouth of the Rio Madeira. 



